linux-kernel - Re: [PATCH] slub: fix slab_pad_check() and SLAB_DESTROY_BY

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Message-ID: <4A9FC8B1.904@gmail.com>
Date:	Thu, 03 Sep 2009 15:46:25 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Zdenek Kabelac <zdenek.kabelac@...il.com>
CC:	Patrick McHardy <kaber@...sh.net>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Robin Holt <holt@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Jesper Dangaard Brouer <hawk@...x.dk>,
	Linux Netdev List <netdev@...r.kernel.org>,
	Netfilter Developers <netfilter-devel@...r.kernel.org>
Subject: Re: [PATCH] slub: fix slab_pad_check() and SLAB_DESTROY_BY_RCU

Zdenek Kabelac a écrit :
> 2009/9/3 Eric Dumazet <eric.dumazet@...il.com>:
>> Zdenek Kabelac a écrit :
>>> Well I'm not noticing any ill behavior - also note - rcu_barrier() is
>>> there before the cache is destroyed.
>>> But as I said - it's just my shot into the dark - which seems to work for me...
>>>
>> Reading again your traces, I do believe there are two bugs in slub
>>
>> Maybe not explaining your problem, but worth to fix !
>>
>> Thank you
>>
>> [PATCH] slub: fix slab_pad_check() and SLAB_DESTROY_BY_RCU
>>
> 
> 
> Ok - I can confirm that this patch fixes my reboot problem.
> 
> Thanks
> 
> Zdenek

Good news !

Hmm... but you had a problem with a 2.6.29.something kernel if I remember well ?

At that time, conntrack did not use SLAB_DESTROY_BY_RCU yet.

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